140. A building erected on or after 1 April 1993 shall be at least 12 m (39.4 ft) away from a building covering the surface opening to the surface of an underground mine, unless the building covering the opening and the building to be erected are constructed with non-combustible materials.
O.C. 213-93, s. 140; Erratum, 1993 G.O. 2, 2603; O.C. 1326-95, s. 27.